Hadley cells

. Incident solar energy drives a Hadley-cell circulation of the atmosphere, which keeps heat from building up at any one location. Air rises in warm regions near the equator on the sunlit side of Venus, where the planet is heated most by the Sun. Some of the warm air flows towards cooler zones near the poles, and sinks and returns to warm equatorial regions again. Strong winds also blow around the planet in the direction that Venus rotates, from east to west.